<SEC-DOCUMENT>0001193125-26-186924.txt : 20260428
<SEC-HEADER>0001193125-26-186924.hdr.sgml : 20260428
<ACCEPTANCE-DATETIME>20260428160504
ACCESSION NUMBER:		0001193125-26-186924
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20260424
FILED AS OF DATE:		20260428
DATE AS OF CHANGE:		20260428

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Hagler Mark Arnold
		CENTRAL INDEX KEY:			0002126029
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39173
		FILM NUMBER:		26907559

	MAIL ADDRESS:	
		STREET 1:		C/O NOVABRIDGE BIOSCIENCES
		STREET 2:		2440 RESEARCH BOULEVARD, SUITE 400
		CITY:			ROCKVILLE
		STATE:			MD
		ZIP:			20850

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			NovaBridge Biosciences
		CENTRAL INDEX KEY:			0001778016
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		ORGANIZATION NAME:           	03 Life Sciences
		EIN:				000000000
		STATE OF INCORPORATION:			E9
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		SUITE 400, 2440 RESEARCH BLVD
		CITY:			ROCKVILLE
		STATE:			MD
		ZIP:			20850
		BUSINESS PHONE:		(301) 670 2800

	MAIL ADDRESS:	
		STREET 1:		SUITE 400, 2440 RESEARCH BLVD
		CITY:			ROCKVILLE
		STATE:			MD
		ZIP:			20850

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	I-Mab
		DATE OF NAME CHANGE:	20190528
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>ownership.xml
<DESCRIPTION>4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0609</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2026-04-24</periodOfReport>

    <issuer>
        <issuerCik>0001778016</issuerCik>
        <issuerName>NovaBridge Biosciences</issuerName>
        <issuerTradingSymbol>NBP</issuerTradingSymbol>
        <issuerForeignTradingSymbol></issuerForeignTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0002126029</rptOwnerCik>
            <rptOwnerName>Hagler Mark Arnold</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerNonUSAddressFlag>false</rptOwnerNonUSAddressFlag>
            <rptOwnerStreet1>C/O NOVABRIDGE BIOSCIENCES,</rptOwnerStreet1>
            <rptOwnerStreet2>2440 RESEARCH BOULEVARD, SUITE 400</rptOwnerStreet2>
            <rptOwnerCity>ROCKVILLE</rptOwnerCity>
            <rptOwnerState>MD</rptOwnerState>
            <rptOwnerZipCode>20850</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>false</isDirector>
            <isOfficer>true</isOfficer>
            <isTenPercentOwner>false</isTenPercentOwner>
            <isOther>false</isOther>
            <officerTitle>See Remarks</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>false</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Ordinary Shares</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <transactionDate>
                <value>2026-04-24</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>false</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>230000</value>
                    <footnoteId id="F2"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>2.51</value>
                    <footnoteId id="F3"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>230000</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The Ordinary Shares may be represented by American Depositary Shares (&quot;ADS&quot;). Each 10 ADSs represent 23 Ordinary Shares of the Issuer.</footnote>
        <footnote id="F2">The reported securities are represented by 100,000 ADSs.</footnote>
        <footnote id="F3">The price reported in Column 4 is a weighted average price. These ADSs were purchased in multiple transactions at prices ranging from $2.44 to $2.54, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.</footnote>
    </footnotes>

    <remarks>President and Chief Commercial Officer</remarks>

    <ownerSignature>
        <signatureName>/s/ Xi-Yong (Sean) Fu as attorney-in-fact</signatureName>
        <signatureDate>2026-04-28</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
